CVE-2020-15141: Openapi python client Path Traversal Vulnerability

LOW
Advisory Identifier: GHSA-7wgr-7666-7pwj
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CVSS 3.0
CWE-22
Published
Advisory Summary

CVE-2020-15141 is a LOW (CVSS 3.0) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Openapi python client libraries in the PyPI ecosystem. The issue involves path traversal in openapi-python-client. Remediation is available by upgrading affected packages to version 0.5.3.

CVE-2020-15141 at a Glance

CVE Identifier CVE-2020-15141
GHSA Identifier GHSA-7wgr-7666-7pwj
Severity LOW
CVSS v3.1 Base Score 3.0
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Openapi python client
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 3.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2020-15141

To remediate this vulnerability, upgrade all affected Openapi python client dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

openapi-python-client fixed: 0.5.3 
pip install openapi-python-client>=0.5.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show openapi-python-client

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2020-15141, inspect your installed packages using pip:

pip show openapi-python-client

Analyze the terminal output to locate any version of Openapi python client in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.5.3), your application is affected.

Note: The pip show openapi-python-client command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Openapi python client, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact Path traversal vulnerability. If a user generated a client using a maliciously crafted OpenAPI document, it is possible for generated files to be placed in arbitrary locations on disk. Giving this a CVSS score of 3.0 (Low) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N/E:P/RL:U/RC:C ### Patches A fix is being worked on for version 0.5.3 ### Workarounds Inspect OpenAPI documents before generating clients for them. ### For more information If you have any questions or comments about this advisory: * Open an issue in [openapi-python-client](https://github.com/triaxtec/openapi-python-client/issues) * Email us at [danthony@triaxtec.com](mailto:danthony@triaxtec.com)

CVE-2020-15141 Affected Openapi python client Versions

1 component(s)
Fixed Versions:
0.5.3
Product / Package Ecosystem Affected Versions Fixed Version
openapi-python-client
pypi/openapi-python-client
PyPI
< 0.5.3
0.5.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/triaxtec/openapi-python-client/security/advisories/GHSA-7wgr-7666-7pwj
NVD — CVE-2020-15141 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15141
Security Fix Commit FIX COMMIT
https://github.com/triaxtec/openapi-python-client/commit/3e7dfae5d0b3685abf1ede1bc6c086a116ac4746
Openapi python client Source Repository REPOSITORY
https://github.com/openapi-generators/openapi-python-client
Openapi python client Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/openapi-python-client/PYSEC-2020-70.yaml
Openapi python client Source Repository REPOSITORY
https://github.com/triaxtec/openapi-python-client/blob/main/CHANGELOG.md#053---2020-08-13
pypi.org/project/openapi-pyt... WEB
https://pypi.org/project/openapi-python-client

Frequently Asked Questions

What is CVE-2020-15141?
CVE-2020-15141 is a security vulnerability in Openapi python client involving Path Traversal in openapi-python-client under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Openapi python client versions are affected?
Affected versions include releases prior to 0.5.3 across affected packages: openapi-python-client.
What version fixes CVE-2020-15141?
Upgrading to 0.5.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openapi-python-client affected?
Yes, openapi-python-client is affected in releases prior to 0.5.3. Upgrade your dependency to 0.5.3 or later.
What is the CVSS score of CVE-2020-15141?
CVE-2020-15141 has a CVSS v3.1 base score of 3.0 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N.
What CWE is associated with CVE-2020-15141?
CVE-2020-15141 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check PyPI dependencies for CVE-2020-15141?
Run the dependency tree command: 'pip show openapi-python-client'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7wgr-7666-7pwj",
  "modified" : "2024-10-07T16:46:45Z",
  "published" : "2020-08-20T14:38:13Z",
  "aliases" : [ "CVE-2020-15141" ],
  "summary" : "Path Traversal in openapi-python-client",
  "details" : "### Impact\nPath traversal vulnerability. If a user generated a client using a maliciously crafted OpenAPI document, it is possible for generated files to be placed in arbitrary locations on disk.\n\nGiving this a CVSS score of 3.0 (Low) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N/E:P/RL:U/RC:C\n\n### Patches\nA fix is being worked on for version 0.5.3\n\n### Workarounds\nInspect OpenAPI documents before generating clients for them.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [openapi-python-client](https://github.com/triaxtec/openapi-python-client/issues)\n* Email us at [danthony@triaxtec.com](mailto:danthony@triaxtec.com)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "openapi-python-client"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.5.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/triaxtec/openapi-python-client/security/advisories/GHSA-7wgr-7666-7pwj"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15141"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/triaxtec/openapi-python-client/commit/3e7dfae5d0b3685abf1ede1bc6c086a116ac4746"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openapi-generators/openapi-python-client"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/openapi-python-client/PYSEC-2020-70.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/triaxtec/openapi-python-client/blob/main/CHANGELOG.md#053---2020-08-13"
  }, {
    "type" : "WEB",
    "url" : "https://pypi.org/project/openapi-python-client"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-14T16:08:41Z",
    "nvd_published_at" : null
  }
}